CN109713766A - Battery management system - Google Patents
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- CN109713766A CN109713766A CN201910183001.7A CN201910183001A CN109713766A CN 109713766 A CN109713766 A CN 109713766A CN 201910183001 A CN201910183001 A CN 201910183001A CN 109713766 A CN109713766 A CN 109713766A
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Abstract
The present invention discloses a kind of battery management system comprising: battery module comprising several battery cells；Data acquisition module comprising be communicatively connected to the voltage collection circuit of each battery cell；Voltage collection circuit acquires the real-time voltage of each battery cell charge and discharge process；Classifier modules are communicatively connected to data acquisition module；Classifier modules include the voltage classification device obtained previously according to the real-time voltage training of voltage collection circuit acquisition；Control module comprising the controller communicated to connect respectively with battery module, data acquisition module and classifier modules；The real-time voltage that controller control voltage classification device acquires voltage collection circuit is classified, and is exported the sorted voltage of each battery cell to controller in real time and is carried out the first battery capacity calculating.The present invention solves the problems, such as that voltage parameter cannot accurately be described with mathematical model and influence capacity precision of prediction under different working conditions, realize high-precision battery capacity prediction.
Description
Technical field
The present invention relates to the technical fields of battery management, it is more particularly related to a kind of battery management system.
Background technique
Voltage, capacity, the resistance of battery are the major parameters for characterizing battery behavior.Since the chemical reaction of inside battery is multiple
Miscellaneous changeable, working condition also causes the parameters such as temperature, resistance that cannot go to describe with accurate mathematical model in real work, thus
Influence the prediction of battery capacity.
Using more SOC, (State of Charge, state-of-charge are also remaining electricity in current battery management system
Amount) evaluation method has a current integration method and open circuit voltage method, and the essence of current integration method is when battery carries out charge or discharge
SOC is estimated by the accumulative electricity for being charged into or releasing, and this method has with battery current (or voltage) and efficiency for charge-discharge
Direct relationship: battery efficiency, under the condition of high temperature and the violent situation of current fluctuation, error is larger；If electric current (or electricity
Pressure) it measures and is not allowed, SOC will be caused to calculate error.For example, battery will appear following three kinds of situations in charge and discharge often: 1) charging
When disconnect power supply, cell voltage can also continue slowly to decline after reducing suddenly；After disconnecting discharge load when electric discharge, cell voltage is then
It also will be slow raising after increasing suddenly；2) battery storage is seldom but cell voltage is very high, however discharges at the beginning, the electricity of battery
Pressure just lowers at once；Alternatively, battery storage is few, voltage is not also high, but charges and start shortly after, and cell voltage just rises
Very high, even if disconnecting charge power supply, cell voltage is not also decreased obviously；3) voltage of battery and use condition do not determine
Linear relationship, different charge and discharge rates, different temperatures, different state-of-charge, the different cell voltages using under course, be all it is each not
It is identical.
In addition, the prior art also can take multiple battery packs to work at the same time, and each battery pack is extremely in order to improve battery capacity
It less further include two battery cells.The voltage measurement error of so each battery cell certainly will be to the electricity between each battery pack
Equalizing strip carrys out error.Therefore, it is very that how research, which makes accurate prediction to the real-time voltage under each operating condition of single battery,
It is necessary to.
Summary of the invention
Shortcoming present in view of the above technology, the present invention provide a kind of battery management system, solve different works
Voltage parameter cannot accurately be described with mathematical model and influence capacity precision of prediction problem under the conditions of condition, realize high-precision electricity
Tankage prediction.
In order to realize these purposes and other advantages according to the present invention, the invention is realized by the following technical scheme:
The present invention provides a kind of battery management system comprising:
Battery module comprising several battery cells；
Data acquisition module comprising be communicatively connected to the voltage collection circuit of each battery cell；The voltage
Acquisition Circuit acquires the real-time voltage of each battery cell charge and discharge process；
Classifier modules are communicatively connected to the data acquisition module；The classifier modules include previously according to institute
State the voltage classification device that the real-time voltage training of voltage collection circuit acquisition obtains；
Control module comprising respectively with the battery module, the data acquisition module and the classifier modules
The controller of communication connection；
Wherein, the controller controls the voltage classification device and carries out to the real-time voltage that the voltage collection circuit acquires
Classification exports each sorted voltage of the battery cell to the controller in real time and carries out the first battery capacity calculating.
Preferably, the voltage classification device further include:
First voltage classifier acquires each battery cell charged state previously according to the voltage collection circuit
Corresponding first voltage training obtains；
Second voltage classifier acquires each battery cell discharge condition previously according to the voltage collection circuit
Corresponding second voltage training obtains；
First selector is communicatively connected to the controller, the voltage collection circuit, the first voltage point respectively
Class device and the second voltage classifier；
Wherein, the controller acquires the charging and discharging state of real-time voltage according to the voltage collection circuit, described in control
First selector correspondence switches between the first voltage classifier and the second voltage classifier.
Preferably, the data acquisition module further includes being communicatively connected to each battery cell and the control respectively
The current collection circuit of device processed；
The classifier modules further include the electric current for being communicatively connected to the controller and the current collection circuit respectively
Classifier, the electric current classifier are obtained previously according to the real-time current training that the current collection circuit acquires；
Wherein, the controller controls the reality that the current collection circuit acquires each battery cell charge and discharge process
When electric current；
The controller controls the real-time current that the electric current classifier acquires the current collection circuit and classifies,
Each sorted electric current of the battery cell to the controller is exported in real time carries out the second battery capacity calculating.
Preferably, the control module further includes the precaution device for being communicatively connected to the controller；
The controller carries out capacity difference calculating to first battery capacity and second battery capacity；The control
Device compares the capacity difference with preset threshold；If the capacity difference is more than preset threshold, the controller issues early warning letter
It ceases and carries out early warning to the precaution device.
Preferably, the electric current classifier further include:
First electric current classifier acquires each battery cell charged state previously according to the current collection circuit
Corresponding first galvanic exercise obtains；
Second electric current classifier acquires each battery cell discharge condition previously according to the current collection circuit
Corresponding second galvanic exercise obtains；
Second selector is communicatively connected to the controller, the current collection circuit, first electric current point respectively
Class device and the second electric current classifier communication connection；
Wherein, the controller acquires the charging and discharging state of real-time current according to the current collection circuit, described in control
Second selector correspondence switches between the first electric current classifier and the second electric current classifier.
Preferably, the data acquisition module further includes being communicatively connected to each battery cell and the controller
Electrical resistance collection circuit；
The classifier modules further include the resistance for being communicatively connected to the controller and the electrical resistance collection circuit respectively
Classifier, the resistance classifier are obtained previously according to the real time resistance training that the electrical resistance collection circuit acquires；
Wherein, the electrical resistance collection circuit is used to acquire the real time resistance of each battery cell charge and discharge process；
The controller controls the real time resistance that the resistance classifier acquires the electrical resistance collection circuit and classifies,
Each sorted resistance of the battery cell is exported in real time.
Preferably, the resistance classifier further include:
First resistor classifier acquires each battery cell charged state previously according to the electrical resistance collection circuit
Corresponding first resistor training obtains；
Second resistance classifier acquires each battery cell discharge condition previously according to the electrical resistance collection circuit
Corresponding second resistance training obtains；
Third selector is communicatively connected to the controller, the electrical resistance collection circuit, the first resistor point respectively
Class device and the second resistance classifier；
Wherein, the controller acquires the charging and discharging state of real time resistance according to the electrical resistance collection circuit, described in control
Third selector correspondence switches between the first resistor classifier and the second resistance classifier.
The present invention is include at least the following beneficial effects:
1) battery management system provided by the invention, the voltage that setting is communicated to connect with voltage collection circuit and controller
Classifier, the real-time voltage that controller control voltage classification device acquires voltage collection circuit are classified, real-time output category
Voltage afterwards to controller carries out the first battery capacity calculating；Mathematical modulo cannot be used relative to voltage parameter under different working conditions
Type accurately describes and influences capacity precision of prediction problem, more stable through the sorted voltage change trend of voltage classification device, improves
The precision of prediction of battery capacity；
2) voltage classification device of the invention is additionally provided with first voltage classifier, second voltage classifier and first choice
Device；The difference of charging and discharging state, voltage is in the different trend for increasing or reducing, and therefore, controller is adopted according to voltage collection circuit
Collect the charging and discharging state of real-time voltage, control first selector it is corresponding first voltage classifier and second voltage classifier it
Between switch, be conducive to further increase the accuracy of classifier classification；
3) data acquisition module of the present invention is additionally provided with current collection circuit, classifier modules are correspondingly provided with electric current classifier,
Electric current classifier is obtained previously according to the real-time current training that current collection circuit acquires；Electric current after real-time output category is extremely controlled
Device processed carries out the second battery capacity calculating；To provide current parameters in charging and discharging state variation dynamic and its prediction the
Two battery capacities are the supplements to voltage parameter and its first battery capacity；
4) present invention is equipped with precaution device, after controller carries out capacity difference calculating to the first battery capacity and the second battery capacity
It compares with preset threshold；If capacity difference is more than preset threshold, controller issues warning information and carries out early warning to precaution device；Pass through
The comparison of first battery capacity and the second battery capacity provides the warning function of battery capacity prediction accuracy；
5) electric current classifier of the invention is additionally provided with the first electric current classifier, the second electric current classifier and the second selection
Device；Due to the difference of charging and discharging state, electric current is in the different trend for increasing or reducing, and therefore, controller is according to voltage acquisition electricity
Road acquires the charging and discharging state of real-time current, and control second selector is corresponding to classify in the first electric current classifier and the second electric current
Switch between device, is conducive to the accuracy for further increasing classifier classification；
6) data acquisition module of the invention is additionally provided with electrical resistance collection circuit, classifier modules are correspondingly provided with resistance classification
Device, resistance classifier are obtained previously according to the real time resistance training that electrical resistance collection circuit acquires；Resistance after real-time output category,
It is the supplement to voltage parameter to provide the variation dynamic of resistance parameter in charging and discharging state.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the communication scheme of battery management system of the present invention.
In figure:
10- battery module；11- battery cell；
20- data acquisition module；
21- voltage collection circuit；22- current collection circuit；23- electrical resistance collection circuit；
30- classifier modules；
31- voltage classification device；
311- first voltage classifier；312- second voltage classifier；313- first selector；
32- electric current classifier；
321- the first electric current classifier；322- the second electric current classifier；323- second selector；
33- resistance classifier；
331- first resistor classifier；332- second resistance classifier；333- third selector；
40- control module；41- controller；42- precaution device.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein are not precluded one or more
The presence or addition of a other elements or combinations thereof.
As shown in Figure 1, the present invention provides a kind of battery management system comprising battery module 10, data acquisition module 20,
Classifier modules 30 and control module 40.
Wherein, battery module 10 is equipped with several battery cells 11.Data acquisition module 20 is each including being communicatively connected to
The voltage collection circuit 21 of battery cell 11；Voltage collection circuit 21 acquires the real-time electricity of each 11 charge and discharge process of battery cell
Pressure.Classifier modules 30 are communicatively connected to data acquisition module 20；Classifier modules 30 include previously according to voltage collection circuit
The voltage classification device 31 that the real-time voltage training of 21 acquisitions obtains.Control module 40 includes adopting respectively with battery module 10, data
Collect the controller 41 that module 20 and classifier modules 30 communicate to connect；Controller 41 controls voltage classification device 31 to voltage acquisition
The real-time voltage that circuit 21 acquires is classified, and is exported the sorted voltage of each battery cell 11 to controller 41 in real time and is carried out
First battery capacity calculates.
In above embodiment, the voltage that present invention setting is communicated to connect with voltage collection circuit 21 and controller 41 divides
Class device 31, controller 41 controls the real-time voltage that voltage classification device 31 acquires voltage collection circuit 21 and classifies, defeated in real time
Sorted voltage to controller 41 carries out the first battery capacity calculating out.It cannot relative to voltage parameter under different working conditions
It is accurately described with mathematical model and influences capacity precision of prediction problem, become through the sorted voltage of voltage classification device 31 of the invention
Change trend is more stable, improves the precision of prediction of battery capacity.
It should be added that under normal circumstances, a battery module 10 includes at least two groups of batteries, and every group of battery is extremely
It less include two battery cells 11.Voltage collection circuit 21 of the invention acquires the real-time of each 11 charge and discharge process of battery cell
Voltage be sent to voltage classification device 31 carry out classification and controller 41 carry out the first battery capacity calculating therefore can be accurate
Ground understands the battery capacity of each battery cell 11.If detecting the battery capacity and other difference of some battery cell 11
It more than threshold value, can replace immediately, avoid the voltage measurement error of each battery cell 11 to the electricity between each battery pack
Equalizing strip carrys out error.
It also needs further to remark additionally, the classifier type and classification method of voltage classification device 31, the present invention is not
It is concrete restriction, such as Bayes, artificial neural network, support vector machines etc..
As the preferred of above embodiment, voltage classification device 31 further includes first voltage classifier 311, second voltage point
Class device 312 and be communicatively connected to respectively controller 41, voltage collection circuit 21, first voltage classifier 311 and second electricity
Press the first selector 313 of classifier 312.
Wherein, first voltage classifier 311 acquires each charging of battery cell 11 shape previously according to voltage collection circuit 21
The corresponding first voltage training of state obtains.Second voltage classifier 312 acquires each electricity previously according to voltage collection circuit 21
The corresponding second voltage training of 11 discharge condition of pond monomer obtains.Controller 41 acquires real-time voltage according to voltage collection circuit 21
Charging and discharging state, control first selector 313 it is corresponding first voltage classifier 311 and second voltage classifier 312 it
Between switch.
In the embodiment, the difference of charging and discharging state is fully considered, voltage is in the different trend for increasing or reducing, because
This, controller 41 acquires the charging and discharging state of real-time voltage according to voltage collection circuit 21, and control first selector 313 corresponds to
Switch between first voltage classifier 311 and second voltage classifier 312, is conducive to the essence for further increasing classifier classification
True property.
As the preferred of above embodiment, data acquisition module 20 further includes being communicatively connected to each battery cell respectively
11 and controller 41 current collection circuit 22；It includes being communicatively connected to controller 41 and electricity respectively that classifier modules 30 are also corresponding
The electric current classifier 32 of Acquisition Circuit 22 is flowed, electric current classifier 32 is instructed previously according to the real-time current that current collection circuit 22 acquires
Practice and obtains.
Wherein, controller 41 controls the real-time electricity that current collection circuit 22 acquires each 11 charge and discharge process of battery cell
Stream；Controller 41 controls the real-time current that electric current classifier 32 acquires current collection circuit 22 and classifies, and output is every in real time
The sorted electric current of a battery cell 11 to controller 41 carries out the second battery capacity calculating.
In above embodiment, the setting of current collection circuit 22 and electric current classifier 32 can be in real time after output category
Electric current to controller carry out the second battery capacity calculating；To provide current parameters in charging and discharging state variation dynamic and
Its second battery capacity predicted is the supplement and comparison to the first battery capacity of voltage parameter and its prediction.
As the preferred of above embodiment, control module 40 further includes the precaution device 42 for being communicatively connected to controller 41.
Controller 41 carries out capacity difference calculating to the first battery capacity and the second battery capacity；Controller 41 is by capacity difference and preset threshold
It compares；If capacity difference is more than preset threshold, controller 41 issues warning information and carries out early warning to precaution device 42.
In the embodiment, the setting of precaution device 42, with hop controller 41 to the first battery capacity and the second battery capacity
Capacity difference make comparisons with preset threshold, the warning function of battery capacity prediction accuracy is provided.As for the early warning of precaution device 42
Mode, the present invention are not particularly limited, such as smog, the tinkle of bells etc..
As the preferred of above embodiment, electric current classifier 32 further includes the first electric current classifier 321, the second electric current point
Class device 322 and second selector 323.First electric current classifier 321 acquires each battery previously according to current collection circuit 22
Corresponding first galvanic exercise of 11 charged state of monomer obtains.Second electric current classifier 322 is previously according to current collection circuit 22
Corresponding second galvanic exercise of each 11 discharge condition of battery cell is acquired to obtain.Second selector 323 is communicatively connected to respectively
Controller 41, current collection circuit 22, the first electric current classifier 321 and the communication connection of the second electric current classifier 32.
Wherein, controller 41 acquires the charging and discharging state of real-time current, the second selection of control according to current collection circuit 22
The correspondence of device 323 switches between the first electric current classifier 321 and the second electric current classifier 322.
In the embodiment, on the basis of electric current classifier 32, the difference of charging and discharging state is fully considered, electric current is in increasing
Different trend that are long or reducing, therefore, controller 41 acquires the charging and discharging state of real-time current, control according to current collection circuit 22
Second selector 323 processed correspondence switches between the first electric current classifier 321 and the second electric current classifier 322, be conducive into
One step improves the accuracy of classifier classification.
As the preferred of above embodiment, data acquisition module 20 further includes being communicatively connected to each 11 He of battery cell
The electrical resistance collection circuit 23 of controller 41, classifier modules 30 further include being communicatively connected to controller 41 and electrical resistance collection electricity respectively
The resistance classifier 33 on road 23, resistance classifier 33 are obtained previously according to the real time resistance training that electrical resistance collection circuit 23 acquires.
Wherein, electrical resistance collection circuit 23 is used to acquire the real time resistance of each 11 charge and discharge process of battery cell；Controller
The real time resistance that 41 control resistance classifiers 33 acquire electrical resistance collection circuit 23 is classified, and exports each battery cell in real time
11 sorted resistance.
In the embodiment, the setting of electrical resistance collection circuit 23 and resistance classifier 33 can get real-time output category
Resistance afterwards is the supplement to voltage parameter to provide the variation dynamic of resistance parameter in charging and discharging state.
As the preferred of above embodiment, resistance classifier 33 further includes first resistor classifier 331, second resistance point
Class device 332 and be communicatively connected to respectively controller 41, electrical resistance collection circuit 23, first resistor classifier 331 and second electricity
Hinder the third selector 333 of classifier 332.First resistor classifier 331 acquires each electricity previously according to electrical resistance collection circuit 23
The corresponding first resistor training of 11 charged state of pond monomer obtains；Second resistance classifier 332 is previously according to electrical resistance collection circuit
The corresponding second resistance training of 23 each 11 discharge conditions of battery cell of acquisition obtains.
Wherein, controller acquires the charging and discharging state of real time resistance according to electrical resistance collection circuit, controls third selector pair
It should switch between first resistor classifier and second resistance classifier.
In above embodiment, on the basis of resistance classifier 33, the difference of resistance when fully considering charging and discharging state
Variation tendency, therefore, controller 41 acquire the charging and discharging state of real time resistance, control third selection according to electrical resistance collection circuit 23
The correspondence of device 333 switches between first resistor classifier 331 and second resistance classifier 332, is conducive to further increase point
The accuracy of class device classification.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With.It can be applied to various suitable the field of the invention completely.It for those skilled in the art can be easily
Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (7)
1. a kind of battery management system, characterized in that it comprises:
Battery module comprising several battery cells；
Data acquisition module comprising be communicatively connected to the voltage collection circuit of each battery cell；The voltage acquisition
Circuit acquires the real-time voltage of each battery cell charge and discharge process；
Classifier modules are communicatively connected to the data acquisition module；The classifier modules include previously according to the electricity
The voltage classification device for pressing the real-time voltage training of Acquisition Circuit acquisition to obtain；
Control module comprising communicated respectively with the battery module, the data acquisition module and the classifier modules
The controller of connection；
Wherein, the real-time voltage that the controller controls that the voltage classification device acquires the voltage collection circuit divides
Class exports each sorted voltage of the battery cell to the controller in real time and carries out the first battery capacity calculating.
2. battery management system as described in claim 1, which is characterized in that the voltage classification device further include:
First voltage classifier, it is corresponding previously according to each battery cell charged state of voltage collection circuit acquisition
First voltage training obtain；
Second voltage classifier, it is corresponding previously according to each battery cell discharge condition of voltage collection circuit acquisition
Second voltage training obtain；
First selector is communicatively connected to the controller, the voltage collection circuit, the first voltage classifier respectively
And the second voltage classifier；
Wherein, the controller acquires the charging and discharging state of real-time voltage, control described first according to the voltage collection circuit
Selector correspondence switches between the first voltage classifier and the second voltage classifier.
3. battery management system as described in claim 1, which is characterized in that
The data acquisition module further includes being communicatively connected to each battery cell respectively and the electric current of the controller is adopted
Collector；
The classifier modules further include being communicatively connected to the electric current classification of the controller and the current collection circuit respectively
Device, the electric current classifier are obtained previously according to the real-time current training that the current collection circuit acquires；
Wherein, the controller controls the real-time electricity that the current collection circuit acquires each battery cell charge and discharge process
Stream；
The controller controls the real-time current that the electric current classifier acquires the current collection circuit and classifies, in real time
It exports each sorted electric current of the battery cell to the controller and carries out the second battery capacity calculating.
4. battery management system as claimed in claim 3, which is characterized in that the control module further includes being communicatively connected to institute
State the precaution device of controller；
The controller carries out capacity difference calculating to first battery capacity and second battery capacity；The controller will
The capacity difference compares with preset threshold；If the capacity difference is more than preset threshold, the controller issues warning information and gives
The precaution device carries out early warning.
5. battery management system as claimed in claim 3, which is characterized in that the electric current classifier further include:
First electric current classifier, it is corresponding previously according to each battery cell charged state of current collection circuit acquisition
The first galvanic exercise obtain；
Second electric current classifier, it is corresponding previously according to each battery cell discharge condition of current collection circuit acquisition
The second galvanic exercise obtain；
Second selector is communicatively connected to the controller, the current collection circuit, the first electric current classifier respectively
And the second electric current classifier communication connection；
Wherein, the controller acquires the charging and discharging state of real-time current, control described second according to the current collection circuit
Selector correspondence switches between the first electric current classifier and the second electric current classifier.
6. battery management system as described in claim 1, which is characterized in that
The data acquisition module further includes the electrical resistance collection electricity for being communicatively connected to each battery cell and the controller
Road；
The classifier modules further include being communicatively connected to the resistance classification of the controller and the electrical resistance collection circuit respectively
Device, the resistance classifier are obtained previously according to the real time resistance training that the electrical resistance collection circuit acquires；
Wherein, the electrical resistance collection circuit is used to acquire the real time resistance of each battery cell charge and discharge process；
The controller controls the real time resistance that the resistance classifier acquires the electrical resistance collection circuit and classifies, in real time
Export each sorted resistance of the battery cell.
7. battery management system as claimed in claim 6, which is characterized in that the resistance classifier further include:
First resistor classifier, it is corresponding previously according to each battery cell charged state of electrical resistance collection circuit acquisition
First resistor training obtain；
Second resistance classifier, it is corresponding previously according to each battery cell discharge condition of electrical resistance collection circuit acquisition
Second resistance training obtain；
Third selector is communicatively connected to the controller, the electrical resistance collection circuit, the first resistor classifier respectively
And the second resistance classifier；
Wherein, the controller acquires the charging and discharging state of real time resistance according to the electrical resistance collection circuit, controls the third
Selector correspondence switches between the first resistor classifier and the second resistance classifier.
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